DealExtreme seems to be selling an "updated" version of the Acekard 2.1 flashcarts.
Several GBAtemp members have reported that the new Acekard 2.1 flashcarts sit in a new shell, have different colored PCB's, and give a '0b0b0b0b' message while in the process of booting up ROMs.

There's a lot of questions and information missing about these "new" Acekard 2.1 flashcarts.
We'll keep you updated if any updates or information tidbits come in about these flashcarts.

Update: These new Acekard 2.1's are in fact real and are manufactured by the Acekard Team.